Locomotive stoker



May 29, 192s. 1,671,331

E. A. TURNER ET AL LOCOMOTIVE STOKER May 29, 192s. 1,671,331

` E. A. TURNER ET A1. v

LOGOMOTIVE sToKER Filed Feb. 4, 1927 2 Sheets-Sheet'I 2 INVENTORS @drift-42,6@-

Patented May 29, 1928.

UNITED STATES EDWIN .AI-BCHER TURNER .AND ALBERT R. CHALKER, OF PITTSBURGH, PENNSYL- VANIA, ASSIGNORS TO LOCOMOTIVE STOKER COMPANY, .A CORPORATION OF PYIENN'-v sYLvANiA.

Locoiuo'riva sroxna.

Arpucauon inea February 4, 1927. semi No. 165,830.

The invention relates to stokers of the scatter-feed type in which the fuel is brought forward from the locomotive tender to an opening in the backheadof thelocouiotive boiler through which it is discharged into the firebox and scattered over the grate.

Theobject of the invention is to provide for the separation of the finer from the coarser particles of fuel at the point of deliveryto the firebox, the finer portions being dropped into a hopper from which it is discharged into the irebox through another opening in the backhead.

While the invention is applicable to stokers of other forms it is shown and described in connection with the transferring mechanism formin the sub'cct of a pending a plication of llathan Lower, SerialI o. 169,219, filed February 18,1927.

In the accompanying drawings:

Fig. 1 is a detail vertical central longitudinal section through the rear portion of a locomotive and the forward portion o f its tender, and through the stoking device;

Fig. 2 is a detail horizontal section on the line 2-2 of Fig. 1;

Fig. 3 is a detail transverse vvertical section on the line 3-3fof Fig. 1; and Y Fig. 4 is a detail longitudinal vertical section of the'backhead of the boiler and the delivery end of the Stoker, showing a modified form of construction.

A portion of the cab of a locomotive is represented at 10; the firebox chamber is indicated at 11; the backhead of the boiler is designated 12; and the firebox grate is shown at 13.

At 14 there is represented the forward end of the tender of the locomotive, the fuel gate 15. The transfer conveyor for carrying the fuel forward from. the tender to the locomotive com rises a plurality of endlessl chains 16 house within a casing 17 which extends under the floor of the fuel bin of the tender and forwardly approximately to the firing opening 18 in the backhead l12, where it isilexibly attached to a delivery nozzle 19 projecting into the firing opening and deivering the fuel upon a distributor plate 20.

The chains 16 are driven from a motor 21 mounted on the frame of a locomotive.

The parts referred to are substantially the same as'are shown and described in the Lower application, but this form of construction is boiler flues.

bin of which is located back of the coal f n used only for the purpose of illustration and is not intended as imposing any limitation upon the sco e of this invention.

The distri utor plate 20 maybe of any preferred forml except that its rearward portion as indicated at 22, upon which the fuel is delivered bythe transferring conveyor, is apertured to constitute a riddle through which the finer particles of the fuelmay drop. The apertures in the rearward portion 22 include the openings 23 through which the chains 16 pass, additional openings here shown in the form of slots.24, being provided as may be found necessary to accomplish the riddling action.

A hop er 25 below the rearward end of the distrlbutor plate receives the fine coal and communicates with the firebox through .a sup lemental opening 26 in -.the hackhead.

12. screw conveyor 27 housed within the hopper urges the fuel forwardly into the firebox. This screw is driven from' the motor 21 by any suitable means, there being shown for this purpose a sprocket chain 28 turning over a sprocket wheel formed on the so engine shaft and another formed on a shaft 29 journaled in the rear wall of the hopper 25 and pinned to and carrying the shaft of the screw 27.4

The supplemental opening 26 of the backhead being adjacent to the grates 13 the fine fuel is delivered upon the latter without scattering, and hence is not in danger of being taken up by the strong draft through the firebox and carried unconsumed into the The fuel delivered over the distributor plate 20 is sutn'ciently coarse to be uninfiuenced by the draft and as a result a substantial saving in fuel is secured.

The modified form of construction shown in Fig. 4 is especially applicable to locomotives having deep lire-boxes. The same form of riddling distributor plate 20 may he employed. The hopper 30 for receiving the ine coal comprises a three-sided structure, bolted to the backhead 12 to enclose the supplemental opening 31 thereinfwhich is located above the normal surface of the lire bed. A steam nipple 32 projects through and is suitably secured within the -rear wall of the hopper 3() and is ported to `iuel muy not he thrown into thezone of uoi lion oi the drnitthrough the lirehon.

The location oi e supplementary firing opening immediately helow the main point otdelivery to the firehox insures an adequate supply oit" fuel directly under the 11`pper distributor, permitting the designing of this distributor with view to i11suring`ade ouate delivery to back corners of the hre hon.

rlhe invention may loe differently einhod i ied either in connection with stoliing mechenisni oi the drag chain type, or other forms. `We claim as our invention:

` l. lncon'ihination, a locomotive having :i

irehox provided with a pair o' vertically alined tiring openings in its `lmcldiea-d, e distributor plete projecting through the upper opening and having e riddle et its rearward end, ineens fordelivering fuel ncrose `the riddle ond ontolthe plete, ineens for die; charging tuel from the plete, o hopper he low the riddle and communicating with the lower opening, end means for discharging fuel from the hopper through such opening.

2. In combination, a locomotive having a iirebox and a pair of vertically alinedV tiring openings in the backhead thereof, en endtrihutor plate projecting through an upper `opening and heving epertures in its reer ward end, an endless drug chain transfer conveyor for delivering fuel onto the dieu trihutor plate, its chains passing through the plate apertures on return, means 'for discharging fuel from the plate into the firehox, `and `means for receiving fuel discharged through the plate apertures and guiding it to a lower bacliheed opening,

4. In combination, a locomotive having a iireboii provided with fuel i'eed openings et diilerent elevations in its huckheavd, a dis trihutor plete projecting through an upper opening and having apertures in its `rearward end, an endless drag chain transfer conveyor for delivering fuel onto the disf tribut-or plete, its chains passing throu h the plate apertures on return, means or discharging fuel Afrom the plato 'into the lirehon, means :for receiving iuel discharged. through the plato nperturesond guiding it to lower backhead opening, and a screw conveyor for forcing fuel through such opening.

5. In combina-tion, a locomotive having a firebox provided with feed openings at diiferent elevations in its backhead, e distributor "plate projecting through an upper opening `amd having aperturesin its rearward end, an. endless drag chain conveyor for delivering fuel onto the plate, :its chains passing through certain of the plete opern tures on return, ineens for discharging fuel `from thepla-te into the* iirebox, and means for receiving fuel discharged through the plate apertures and guiding it to a lower backhesd opening.

In witness whereof we efx our signatures.. j

E. ARCHER TURNER. ALBERT R. 'CHALKER 

